Hi i want to shoot some scenes over 300 fps anyone know any good camera in the prosumer price range that i can either rent or buy, i dont want a phantom or anything in that category more like a high speed 7D lol.

There is some Sony handycam that does 300fps. Can't remember the model number. It really does do 300 real frames per second for a brief period, but the quality is... feeble, frankly.

There are other companies, such as Redlake, who make high speed cameras. Mainly they're repurposed machine vision and scientific cameras, which is where Vision Research came from originally, hence the name. I've not seen one that was as good as some of the Phantom stuff and I suspect it'd be ergonomically a bit iffy, probably requiring a computer-based host system, but it would be usable with care and I suspect they'd handily undercut Vision Research.

Twixtor (and other motion compensated interpolators) can be extremely successful on certain subjects and fail hard on others; if it's possible to design your shot around what it will and will not cope with, results can be good.